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microblaze: Setup MB vectors if feature is enable for u-boot

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For example: Setup reset vectors if reset address is setup.
Setup user exception vector if user exception is enabled

Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Michal Simek 2011-07-21 10:47:21 +02:00
parent dfc10703d7
commit 86c1b2a86b
1 changed files with 22 additions and 12 deletions
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34
arch/microblaze/cpu/start.S
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@ -30,6 +30,13 @@
.text
.global _start
_start:
/*
* reserve registers:
* r10: Stores little/big endian offset for vectors
* r2: Stores imm opcode
* r3: Stores brai opcode
*/
mts rmsr, r0 /* disable cache */
addi r1, r0, CONFIG_SYS_INIT_SP_OFFSET
addi r1, r1, -4 /* Decrement SP to top of memory */
@ -47,21 +54,15 @@ _start:
swi r6, r0, 0
lbui r10, r0, 0
/* add opcode instruction for 32bit jump - 2 instruction imm & brai*/
addi r6, r0, 0xb0000000 /* hex b000 opcode imm */
swi r6, r0, 0x0 /* reset address */
swi r6, r0, 0x8 /* user vector exception */
swi r6, r0, 0x10 /* interrupt */
swi r6, r0, 0x20 /* hardware exception */
addi r6, r0, 0xb8080000 /* hew b808 opcode brai*/
swi r6, r0, 0x4 /* reset address */
swi r6, r0, 0xC /* user vector exception */
swi r6, r0, 0x14 /* interrupt */
swi r6, r0, 0x24 /* hardware exception */
/* add opcode instruction for 32bit jump - 2 instruction imm & brai */
addi r2, r0, 0xb0000000 /* hex b000 opcode imm */
addi r3, r0, 0xb8080000 /* hew b808 opcode brai */
#ifdef CONFIG_SYS_RESET_ADDRESS
/* reset address */
swi r2, r0, 0x0 /* reset address - imm opcode */
swi r3, r0, 0x4 /* reset address - brai opcode */
addik r6, r0, CONFIG_SYS_RESET_ADDRESS
sw r6, r1, r0
lhu r7, r1, r0
@ -88,6 +89,9 @@ _start:
#ifdef CONFIG_SYS_USR_EXCEP
/* user_vector_exception */
swi r2, r0, 0x8 /* user vector exception - imm opcode */
swi r3, r0, 0xC /* user vector exception - brai opcode */
addik r6, r0, _exception_handler
sw r6, r1, r0
/*
@ -119,6 +123,9 @@ _start:
#ifdef CONFIG_SYS_INTC_0
/* interrupt_handler */
swi r2, r0, 0x10 /* interrupt - imm opcode */
swi r3, r0, 0x14 /* interrupt - brai opcode */
addik r6, r0, _interrupt_handler
sw r6, r1, r0
lhu r7, r1, r10
@ -129,6 +136,9 @@ _start:
#endif
/* hardware exception */
swi r2, r0, 0x20 /* hardware exception - imm opcode */
swi r3, r0, 0x24 /* hardware exception - brai opcode */
addik r6, r0, _hw_exception_handler
sw r6, r1, r0
lhu r7, r1, r10